Why scarf joints are no stronger than square joints 

In this short video I debunk the myth that because scarf joints have more weld metal than conventional square butt joints they must be stronger. This is simply not true and I explain why this is the case.
In my opinion these joints should only be used in timber structures where they originated.
This video is an addendum to my recent video on chassis splice joints.
Trigger warning - contains technical content :-(